You could use htop in a terminal to see if there is a process hoging your system.
Also look into disk access with htop to see if there is a zombie holding onto a disk. Use F1 for quick reference. There should be no Z's and D's. If there is, kill the process.
Also, there was a problem many a moon ago with people not having defined a correct hostname for their PC's, and the problem only affected Gnome. It would take for ever to load anything GTK (like starting up Gnome, etc.)
If this is the case:
Code:
hostname (to make sure you set one)
if not
nano -w /etc/conf.d/hostname (it will be something similar on Ubuntu)
Just re-read the post again and there is so many things that could have gone "wrong".
* Have you restarted X? (Ctrl+Alt+Backspace) Usually if it is gfx related it will not start gdm and you will then know to troubleshoot your gfx drivers.
* Did you reboot the machine since the update? If is was a kernel update that should sort it (kernel 2.6.27 gentoo-sources was released yesterday for gentoo, maybe you had a kernel update?
* Have you tested your Open-GL? Run glxgears in a terminal, what FPS do you get and what type of GFX card do you have?
* Have you updated your GFX drivers lately? Specially nVidia? If yes and the above does not work (no glxgears due to some arb error), do this:
Code:
rmmod nvidia
modprobe nvidia
eselect opengl set nvidia
If you could get a list of what you updated then it would also be much easier to narrow the field.
